Chassis dynamometers are very popular to run some quick tests for installed power and check out the chassis and drivetrain. They are quick to use but have some problems that should be made clear before you start down that direction. If you plan on testing a few sets of exhaust components or any bolt-on parts that might take more time than if the testing was done on an engine dyno, so do some planning and think about what you want to accomplish.
Chassis dynamometers come in all sorts of designs and configurations but there are some things that are common to all. Most designs test a vehicle that powers a roll or rolls for all wheel drive types. Most can provide some common numbers for horsepower but not all measure torque to do so. Basically there are two general types of chassis dynos – inertia only and those that measure torque with either an electric load or even a mechanical brake. All have to get rid of the heat from the vehicle and the dyno as well.